Weeks Formation
75 distinct taxa, from 104 fossil occurrences the Paleobiology Database records under this name, spanning 505–497 Mya.
Utah · US
75 taxa · 104 fossils · 505–497 MyaMembers recorded: Upper.
Macrostrat dates this rock 502–500 Ma. Macrostrat’s own record
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3 distinct localities, where the rock is now rather than where it was laid down. Tectonics draws the world it belonged to.
When
What has been found
- Arthropoda
- Cedaria minor
- Genevievella granulata
- Lingulella
- Problematica
- Weeksina unispinus
- Beckwithia typa
- Canthylotreta
- Cnidaria
- Dakorhachis thambus
- Falcatamacaris bellua
- Menomonia
- Notchia weugi
- Pahvanticystis utahensis
- Porifera
- Tricrepicephalus texanus
- Acmarhachis typicalis
- Aglaspis
- Ammagnostus
- Ammagnostus laiwuensis
- Anabarochilina
- Anabarochilina australis
- Anomalocaris
- Anomalocaris canadensis
- Arapahoia
- Bradoriida
- Cambrorhytium fragilis
- Cambrorhytium major
- Cedarina
- Clavagnostus spinosus
- Coosella kieri
- Crumillospongia
- Ctenophora
- Deiracephalus aster
- Diagoniella
- Dresbachia
- Fordinia perfecta
- Glypharthrus
- Halichondrites
- Hardyoides tenerus
The 40 most often recorded, of 75.
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.